STM32F103 SDIO中断异常的问题

发布于 2013-06-06 21:29:46 浏览：6339 订阅该版

基于STM32F103ZE的平台，在RT的系统内添加DFS文件系统碰到SDIO注册中断的异常，请高手祥解

application.c 
```void rt_init_thread_entry(void* parameter)
{
	/* init sdcard driver */
	rt_hw_sdcard_init();
	/* init the device filesystem */
	dfs_init();
	/* init the elm chan FatFs filesystam*/
	elm_init();
	
	/* mount sd card fat partition 1 as root directory */
	if (dfs_mount("sd0", "/", "elm", 0, 0) == 0) {
		rt_kprintf("File System initialized!
");
	} else { 
		rt_kprintf("File System initialzation failed!
"); 
	} 
... ... 
} ```

sdcard.c
```static rt_err_t rt_sdcard_init(rt_device_t dev)
{
	NVIC_InitTypeDef NVIC_InitStructure;

NVIC_InitStructure.NVIC_IRQChannel = SDIO_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
	NVIC_Init(&NVIC_InitStructure);	//注册SDIO中断异常
	if (rt_sem_init(&sd_lock, "sdlock", 1, RT_IPC_FLAG_FIFO) != RT_EOK) {
		rt_kprintf("init sd lock semaphore failed
");
	}
	return RT_EOK;
}```

misc.c 
```void NVIC_Init(NVIC_InitTypeDef* NVIC_InitStruct)
{ 
	uint32_t tmppriority = 0x00, tmppre = 0x00, tmpsub = 0x0F;

/* Check the parameters */
	assert_param(IS_FUNCTIONAL_STATE(NVIC_InitStruct->NVIC_IRQChannelCmd));
	assert_param(IS_NVIC_PREEMPTION_PRIORITY(NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority));  
	assert_param(IS_NVIC_SUB_PRIORITY(NVIC_InitStruct->NVIC_IRQChannelSubPriority));

if (NVIC_InitStruct->NVIC_IRQChannelCmd != DISABLE) { 
		/* Compute the Corresponding IRQ Priority --------------------------------*/  
		tmppriority = (0x700 - ((SCB->AIRCR) & (uint32_t)0x700))>> 0x08;
		tmppre = (0x4 - tmppriority);
		tmpsub = tmpsub >> tmppriority;

tmppriority = (uint32_t)NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority << tmppre;
		tmppriority |=  NVIC_InitStruct->NVIC_IRQChannelSubPriority & tmpsub;
		tmppriority = tmppriority << 0x04;

NVIC->IP[NVIC_InitStruct->NVIC_IRQChannel] = tmppriority;

/* Enable the Selected IRQ Channels --------------------------------------*/
		NVIC->ISER[NVIC_InitStruct->NVIC_IRQChannel >> 0x05] = 
			(uint32_t)0x01 << (NVIC_InitStruct->NVIC_IRQChannel & (uint8_t)0x1F);			//设置中断异常表
 	} else { 
 		/* Disable the Selected IRQ Channels -------------------------------------*/
		NVIC->ICER[NVIC_InitStruct->NVIC_IRQChannel >> 0x05] = 
			(uint32_t)0x01 << (NVIC_InitStruct->NVIC_IRQChannel & (uint8_t)0x1F); 
	}
}```

startup_stm32f10x_hd.s
```FSMC_IRQHandler
SDIO_IRQHandler
TIM5_IRQHandler
SPI3_IRQHandler
UART4_IRQHandler
UART5_IRQHandler
TIM6_IRQHandler
TIM7_IRQHandler
DMA2_Channel1_IRQHandler
DMA2_Channel2_IRQHandler
DMA2_Channel3_IRQHandler
DMA2_Channel4_5_IRQHandler
                B       .  产生了一个未知的中断，程序被挂起

ENDP

ALIGN```

如修改misc.c文件设置中断向量异常表的代码，则程序可以往下执行
原始代码
```		/* Enable the Selected IRQ Channels --------------------------------------*/
		NVIC->ISER[NVIC_InitStruct->NVIC_IRQChannel >> 0x05] = 
			(uint32_t)0x01 << (NVIC_InitStruct->NVIC_IRQChannel & (uint8_t)0x1F);```
修改后的代码

```		/* Enable the Selected IRQ Channels --------------------------------------*/
		NVIC->ISER[NVIC_InitStruct->NVIC_IRQChannel >> 0x05] = 
			(uint32_t)0x01 << (NVIC_InitStruct->NVIC_IRQChannel >> 5);```

请问高手，这个问题是因为什么而引起的，如何才能解决，还是st的固件库存在BUG？